 | | Re: Digit outputs....
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Rather than trying to figure out the hex for the bits, I use the IC binaray number format, "0b". I set the bits using a binary mask, for example, to set the MOSI pin high, I use: bit_set(0x1008, 0b00001000) then to set the MOSI pin low, I use: (...) (28 years ago, 20-Feb-97, to lugnet.robotics.handyboard)
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| | Digit outputs....
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I've tried to program the digital outputs from the SPI header J6 on the HB with no success. I pump the values into the HB as per instruction form the FAQ note and measure the 4 outputs. No high/low, just some sort of oscillation. What could be my (...) (28 years ago, 20-Feb-97, to lugnet.robotics.handyboard)
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| | Re: Motors & handyboard
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(...) This is also excellent advice. On one R/C car I had, I ended up having to simulate the signal input to the controller because the h-bridge was so screwy but it does save you from having to build your own. On a related note, Radio Shack sells (...) (28 years ago, 19-Feb-97, to lugnet.robotics.handyboard)
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| | Re: Motors & handyboard
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(...) Why not use the H-bridge that is already on the bulldozer? If you work backwards throught the motor driver circuitry, or use the RF controller to send commands to the dozer and see what voltages change you can figure out where the inputs to (...) (28 years ago, 19-Feb-97, to lugnet.robotics.handyboard)
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| | Re: running .s19
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shouldn't you be going into expanded mode, not single chip? (...) (28 years ago, 19-Feb-97, to lugnet.robotics.handyboard)
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| | Re: running .s19
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does your program to anything else other than attempt to leave special mode? You could have it write a value to the motor address ($7000); that would be a more visible indication that it is running. BTW, why is your first instinct to take it out of (...) (28 years ago, 19-Feb-97, to lugnet.robotics.handyboard)
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| | running .s19
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Hello, I am trying to use normal .asm files assembled with as11 on the handy-board. I am not using IC. Although my .s19 file downloads fine I don't think it is being run. My code begins at $D000. I use an ORG statement to set $BFFE:$BFFE to $D000. (...) (28 years ago, 19-Feb-97, to lugnet.robotics.handyboard)
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| | Re: Polaroid Sonar
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Sriram, (...) It is on the outer edge of the module neer the ribbon cable connector. Its exact location is indicated by a circle with a + sign to indicate the polarity. (...) I simply (temporary) soldered to the connector at the end of the ribbon (...) (28 years ago, 18-Feb-97, to lugnet.robotics.handyboard)
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| | reset vector
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(...) Since the Handyboard runs in "special test mode", the vectors are in the $BFxx page. Therefore, you'd want to use $BFFE:$BFFF. -- Randy ---...--- Randy Sargent Newton Research Labs Senior Design Engineer Robotic Systems and Software (...) (28 years ago, 18-Feb-97, to lugnet.robotics.handyboard)
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| | Re: Motors & handyboard
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(...) It has been my experience that it is easier to change the drive circuitry than it is to change the motors. The circuitry is just solder and chips, the motors are mechanical tooling. Driving the Tamiya BullDozer from the HB is certainly (...) (28 years ago, 18-Feb-97, to lugnet.robotics.handyboard)
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